83 FR 33252 - Proposed Extension of Information Collection; Ventilation Plans, Tests, and Examinations in Underground Coal Mines

DEPARTMENT OF LABOR
Mine Safety and Health Administration

Federal Register Volume 83, Issue 137 (July 17, 2018)

Page Range		33252-33254
FR Document		2018-15217

The Department of Labor, as part of its continuing effort to reduce paperwork and respondent burden, conducts a pre-clearance consultation program to provide the general public and Federal agencies with an opportunity to comment on proposed collections of information in accordance with the Paperwork Reduction Act of 1995. This program helps to ensure that requested data can be provided in the desired format, reporting burden (time and financial resources) is minimized, collection instruments are clearly understood, and the impact of collection requirements on respondents can be properly assessed. Currently, the Mine Safety and Health Administration (MSHA) is soliciting comments on the information collection for Ventilation Plans, Tests, and Examinations in Underground Coal Mines.

Federal Register, Volume 83 Issue 137 (Tuesday, July 17, 2018)

[Federal Register Volume 83, Number 137 (Tuesday, July 17, 2018)]
[Notices]
[Pages 33252-33254]
From the Federal Register Online  [www.thefederalregister.org]
[FR Doc No: 2018-15217]


-----------------------------------------------------------------------

DEPARTMENT OF LABOR

Mine Safety and Health Administration

[OMB Control No. 1219-0088]


Proposed Extension of Information Collection; Ventilation Plans, 
Tests, and Examinations in Underground Coal Mines

AGENCY: Mine Safety and Health Administration, Labor.

ACTION: Request for public comments.

-----------------------------------------------------------------------

SUMMARY: The Department of Labor, as part of its continuing effort to 
reduce paperwork and respondent burden, conducts a pre-clearance 
consultation program to provide the general public and Federal agencies 
with an opportunity to comment on proposed collections of information 
in accordance with the Paperwork Reduction Act of 1995. This program 
helps to ensure that requested data can be provided in the desired 
format, reporting burden (time and financial resources) is minimized, 
collection instruments are clearly understood, and the impact of 
collection requirements on respondents can be properly assessed. 
Currently, the Mine Safety and Health Administration (MSHA) is 
soliciting comments on the information collection for Ventilation 
Plans, Tests, and Examinations in Underground Coal Mines.

DATES: All comments must be received on or before September 17, 2018.

ADDRESSES: Comments concerning the information collection requirements 
of this notice may be sent by any of the methods listed below.
     Federal E-Rulemaking Portal: http://www.regulations.gov. 
Follow the on-line instructions for submitting comments for docket 
number MSHA-2018-0025.
     Regular Mail: Send comments to USDOL-MSHA, Office of 
Standards, Regulations, and Variances, 201 12th Street South, Suite 
4E401, Arlington, VA 22202-5452.
     Hand Delivery: USDOL-Mine Safety and Health 
Administration, 201 12th Street South, Suite 4E401, Arlington, VA 
22202-5452. Sign in at the receptionist's desk on the 4th floor via the 
East elevator.

FOR FURTHER INFORMATION CONTACT: Sheila McConnell, Director, Office of 
Standards, Regulations, and Variances, MSHA, at 
[email protected] (email); (202) 693-9440 (voice); 
or (202) 693-9441 (facsimile).

SUPPLEMENTARY INFORMATION: 

I. Background

    Section 103(h) of the Federal Mine Safety and Health Act of 1977 
(Mine Act), 30 U.S.C. 813(h), authorizes MSHA to collect information 
necessary to carry out its duty in protecting the safety and health of 
miners. Under Section 101(a) of the Federal Mine Safety and Health Act 
of 1977 (Mine Act), the Secretary of Labor (Secretary) may by rule in 
accordance with procedures set forth in this section and in accordance 
with section 553 of Title 5, United States Code (without regard to any 
reference in such section to sections 556 and 557 of such title), 
develop, promulgate, and revise as may be appropriate, improved 
mandatory health or safety standards for the protection of life and 
prevention of injuries in coal or other mines. In addition, section 303 
requires that all underground coal mines be ventilated by mechanical 
ventilation equipment installed and operated in a manner approved by an 
authorized representative of the Secretary and such equipment be 
examined daily and a record be kept of such examination.
    Underground coal mines usually present harsh and hostile working 
environments. The ventilation system is the most vital life support 
system in underground mining and a properly operating ventilation 
system is essential for maintaining a safe and healthful working 
environment. Lack of adequate ventilation in underground mines has 
resulted in fatalities from asphyxiation and explosions.
    An underground mine is a maze of tunnels that must be adequately 
ventilated with fresh air to provide a safe environment for miners. 
Methane is liberated from the strata, and noxious gases and dusts from 
blasting and other mining activities may be present. The explosive and 
noxious gases and dusts must be diluted, rendered harmless, and carried 
to the surface by the ventilating currents. Sufficient air must be 
provided to maintain the level of respirable dust at or below specific 
exposure limits and air quality must be maintained in accordance with 
MSHA standards. Mechanical ventilation equipment of sufficient capacity 
must operate at all times while miners are in the mine. Ground 
conditions are subject to frequent changes, thus sufficient tests and 
examinations are necessary to ensure the integrity of the ventilation 
system and to detect any changes that may require adjustments in the 
system. Records of tests and examinations are necessary to ensure that 
the ventilation system is being maintained and that changes which could 
adversely affect the integrity of the system or the safety of the 
miners are not occurring. These examination, reporting and 
recordkeeping requirements of sections 75.310, 75.312, 75.342, 75.351, 
75.360 through 75.364, 75.370, 75.371, and 75.382 also incorporate 
examinations of other critical aspects of the underground work 
environment such as roof conditions and electrical equipment which have 
historically caused numerous fatalities when not properly maintained 
and operated.
    Section 75.362, On-shift Examinations, was revised at subsection 
75.362 (a)(2) and (g)(2)-(4) by MSHA's rule titled ``Lowering Miners' 
Exposure to Respirable Coal Mine Dust, Including

[[Page 33253]]

Continuous Personal Dust Monitors, '' published May 1, 2014. This rule 
also revised subsection 75.371(f) and (j).
    Subsection 75.362(a)(2) requires that a person designated by the 
operator conduct an examination and record the results and the 
corrective actions taken to assure compliance with the respirable dust 
control parameters specified in the approved mine ventilation plan.
    Under subsection 75.362(g)(2)(i), the certified person directing 
the on-shift examination must certify by initials, date, and time on a 
board maintained at the section load out or similar location showing 
that the examination was made prior to resuming production. No 
increased burden is estimated for section 75.362(g)(2)(i) in this 
Information Collection Request (ICR) because MSHA does not expect the 
burden to be different from the burden in existing section 
75.362(g)(2)).
    Under section 75.362(g)(2)(ii), the certified person directing the 
on-shift examination must verify, by initials, date and time, the 
record of the results of the examination required under section 
75.362(a)(2) to assure compliance with the respirable dust control 
parameters specified in the mine ventilation plan. Further, section 
75.362(g)(3) requires a mine foreman or equivalent mine official to 
countersign each examination record required under section 75.362(a)(2) 
after it is verified by the certified person under section 
75.362(g)(2)(ii), and no later than the end of the mine foreman's or 
equivalent mine official's next regularly scheduled working shift. 
Section 75.362(g)(2)(ii) and (g)(3) are additional burdens that are 
accounted for in this ICR and 75.362(g)(2)(ii)(4) requires the records 
be retained at a surface location at the mine for at least 1 year and 
shall be made available for inspection by authorized representatives of 
the Secretary and the representative of miners.
    Paragraph (a)(2) in section 75.370 (Mine ventilation plan; 
submission and approval) contains the burden for underground coal mine 
operators to submit mine ventilation plan revisions for District 
Manager approval. Each mine ventilation plan must include information 
that is specified by section 75.371 (Mine ventilation plan; contents).
    Section 75.371(f) adds the following information that a mine 
operator must include in the mine ventilation plan: the minimum 
quantity of air that will be delivered to the working section for each 
mechanized mining unit (MMU), and the identification by make and model, 
of each different dust suppression system used on equipment on each 
working section, including: (1) The number, types, location, 
orientation, operating pressure, and flow rate of operating water 
sprays; (2) the maximum distance that ventilation control devices will 
be installed from each working face when mining or installing roof 
bolts in entries and crosscuts; (3) procedures for maintaining the roof 
bolter dust collection system in approved condition; and (4) 
recommended best work practices for equipment operators to minimize 
dust exposure.
    Section 75.371(j) adds a requirement that for machine mounted dust 
collectors, the ventilation plan must include the type and size of dust 
collector screens used and a description of the procedures to be 
followed to properly maintain dust collectors used on the equipment.
    Section 75.370(a)(2) requires all underground coal mine operators 
to submit revisions for mine ventilation plans to MSHA. The burden to 
submit the additional information required by section 75.371(f) and (j) 
as proposed revisions to the plan is accounted for in this package 
under section 75.370(a)(2). In addition, section 75.370(a)(3)(i) 
requires underground coal mine operators to notify the miners' 
representative at least 5 days prior to submission of mine ventilation 
plan revisions and, if requested, provide a copy of the revisions to 
the miners' representative at the time of notification. Section 
75.370(a)(3)(iii) and (f)(3) require the operator to post a copy of the 
plan revisions, and section 75.370(f)(1) requires that the operator 
provide a copy of the revisions to the miners' representative, if 
requested. MSHA assumes that a copy of the revisions will be requested. 
The burdens for notification, providing requested copies, and posting 
associated with mine ventilation plan revisions resulting from section 
75.371(f) and (j) are accounted for in this package under section 
75.370(a)(3)(i), (f)(1), (a)(3)(iii), and (f)(3) respectively.

II. Desired Focus of Comments

    MSHA is soliciting comments concerning the proposed information 
collection related to Ventilation Plans, Tests, and Examinations in 
Underground Coal Mines. MSHA is particularly interested in comments 
that:
     Evaluate whether the collection of information is 
necessary for the proper performance of the functions of the Agency, 
including whether the information has practical utility;
     Evaluate the accuracy of MSHA's estimate of the burden of 
the collection of information, including the validity of the 
methodology and assumptions used;
     Suggest methods to enhance the quality, utility, and 
clarity of the information to be collected; and
     Minimize the burden of the collection of information on 
those who are to respond, including through the use of appropriate 
automated, electronic, mechanical, or other technological collection 
techniques or other forms of information technology, e.g., permitting 
electronic submission of responses.
    The information collection request will be available on http://www.regulations.gov. MSHA cautions the commenter against providing any 
information in the submission that should not be publicly disclosed. 
Full comments, including personal information provided, will be made 
available on www.regulations.gov and www.reginfo.gov.
    The public may also examine publicly available documents at USDOL-
Mine Safety and Health Administration, 201 12th South, Suite 4E401, 
Arlington, VA 22202-5452. Sign in at the receptionist's desk on the 4th 
floor via the East elevator.
    Questions about the information collection requirements may be 
directed to the person listed in the FOR FURTHER INFORMATION CONTACT 
section of this notice.

III. Current Actions

    This request for collection of information contains provisions for 
Ventilation Plans, Tests, and Examinations in Underground Coal Mines. 
MSHA has updated the data with respect to the number of respondents, 
responses, burden hours, and burden costs supporting this information 
collection request.
    Type of Review: Extension, without change, of a currently approved 
collection.
    Agency: Mine Safety and Health Administration.
    OMB Number: 1219-0088.
    Affected Public: Business or other for-profit.
    Number of Respondents: 255.
    Frequency: On occasion.
    Number of Responses: 1,164,908.
    Annual Burden Hours: 142,550 hours.
    Annual Respondent or Recordkeeper Cost: $91,870.
    Comments submitted in response to this notice will be summarized 
and included in the request for Office of Management and Budget 
approval of the

[[Page 33254]]

information collection request; they will also become a matter of 
public record.

Sheila McConnell,
Certifying Officer.
[FR Doc. 2018-15217 Filed 7-16-18; 8:45 am]
 BILLING CODE 4510-43-P

Federal Register / Vol. 83, No. 137 / Tuesday, July 17, 2018 / Notices 33253

Continuous Personal Dust Monitors, ’’ on each working section, including: (1) of information, including the validity of
published May 1, 2014. This rule also The number, types, location, the methodology and assumptions used;
revised subsection 75.371(f) and (j). orientation, operating pressure, and • Suggest methods to enhance the
Subsection 75.362(a)(2) requires that a flow rate of operating water sprays; (2) quality, utility, and clarity of the
person designated by the operator the maximum distance that ventilation information to be collected; and
conduct an examination and record the control devices will be installed from
• Minimize the burden of the
results and the corrective actions taken each working face when mining or
to assure compliance with the respirable collection of information on those who
installing roof bolts in entries and
dust control parameters specified in the are to respond, including through the
crosscuts; (3) procedures for
approved mine ventilation plan. use of appropriate automated,
maintaining the roof bolter dust
Under subsection 75.362(g)(2)(i), the electronic, mechanical, or other
collection system in approved
certified person directing the on-shift technological collection techniques or
condition; and (4) recommended best
examination must certify by initials, other forms of information technology,
work practices for equipment operators
date, and time on a board maintained at e.g., permitting electronic submission of
to minimize dust exposure.
the section load out or similar location Section 75.371(j) adds a requirement responses.
showing that the examination was made that for machine mounted dust The information collection request
prior to resuming production. No collectors, the ventilation plan must will be available on http://
increased burden is estimated for include the type and size of dust www.regulations.gov. MSHA cautions
section 75.362(g)(2)(i) in this collector screens used and a description the commenter against providing any
Information Collection Request (ICR) of the procedures to be followed to information in the submission that
because MSHA does not expect the properly maintain dust collectors used should not be publicly disclosed. Full
burden to be different from the burden on the equipment. comments, including personal
in existing section 75.362(g)(2)). Section 75.370(a)(2) requires all information provided, will be made
Under section 75.362(g)(2)(ii), the underground coal mine operators to available on www.regulations.gov and
certified person directing the on-shift submit revisions for mine ventilation www.reginfo.gov.
examination must verify, by initials, plans to MSHA. The burden to submit The public may also examine publicly
date and time, the record of the results the additional information required by available documents at USDOL-Mine
of the examination required under section 75.371(f) and (j) as proposed Safety and Health Administration, 201
section 75.362(a)(2) to assure revisions to the plan is accounted for in 12th South, Suite 4E401, Arlington, VA
compliance with the respirable dust this package under section 75.370(a)(2). 22202–5452. Sign in at the receptionist’s
control parameters specified in the mine In addition, section 75.370(a)(3)(i) desk on the 4th floor via the East
ventilation plan. Further, section requires underground coal mine elevator.
75.362(g)(3) requires a mine foreman or operators to notify the miners’
equivalent mine official to countersign Questions about the information
representative at least 5 days prior to
each examination record required under collection requirements may be directed
submission of mine ventilation plan
section 75.362(a)(2) after it is verified by to the person listed in the FOR FURTHER
revisions and, if requested, provide a
INFORMATION CONTACT section of this
the certified person under section copy of the revisions to the miners’
75.362(g)(2)(ii), and no later than the notice.
representative at the time of
end of the mine foreman’s or equivalent notification. Section 75.370(a)(3)(iii) III. Current Actions
mine official’s next regularly scheduled and (f)(3) require the operator to post a
working shift. Section 75.362(g)(2)(ii) copy of the plan revisions, and section This request for collection of
and (g)(3) are additional burdens that 75.370(f)(1) requires that the operator information contains provisions for
are accounted for in this ICR and provide a copy of the revisions to the Ventilation Plans, Tests, and
75.362(g)(2)(ii)(4) requires the records miners’ representative, if requested. Examinations in Underground Coal
be retained at a surface location at the MSHA assumes that a copy of the Mines. MSHA has updated the data
mine for at least 1 year and shall be revisions will be requested. The burdens with respect to the number of
made available for inspection by for notification, providing requested respondents, responses, burden hours,
authorized representatives of the copies, and posting associated with and burden costs supporting this
Secretary and the representative of mine ventilation plan revisions information collection request.
miners. resulting from section 75.371(f) and (j) Type of Review: Extension, without
Paragraph (a)(2) in section 75.370 are accounted for in this package under change, of a currently approved
(Mine ventilation plan; submission and section 75.370(a)(3)(i), (f)(1), (a)(3)(iii), collection.
approval) contains the burden for and (f)(3) respectively. Agency: Mine Safety and Health
underground coal mine operators to Administration.
submit mine ventilation plan revisions II. Desired Focus of Comments
OMB Number: 1219–0088.
for District Manager approval. Each MSHA is soliciting comments
mine ventilation plan must include concerning the proposed information Affected Public: Business or other for-
information that is specified by section collection related to Ventilation Plans, profit.
75.371 (Mine ventilation plan; Tests, and Examinations in Number of Respondents: 255.
contents). Underground Coal Mines. MSHA is Frequency: On occasion.
Section 75.371(f) adds the following particularly interested in comments Number of Responses: 1,164,908.
information that a mine operator must that:
daltland on DSKBBV9HB2PROD with NOTICES

Annual Burden Hours: 142,550 hours.
include in the mine ventilation plan: the • Evaluate whether the collection of
minimum quantity of air that will be information is necessary for the proper Annual Respondent or Recordkeeper
delivered to the working section for performance of the functions of the Cost: $91,870.
each mechanized mining unit (MMU), Agency, including whether the Comments submitted in response to
and the identification by make and information has practical utility; this notice will be summarized and
model, of each different dust • Evaluate the accuracy of MSHA’s included in the request for Office of
suppression system used on equipment estimate of the burden of the collection Management and Budget approval of the

VerDate Sep<11>2014 17:07 Jul 16, 2018 Jkt 244001 PO 00000 Frm 00062 Fmt 4703 Sfmt 4703 E:\FR\FM\17JYN1.SGM 17JYN1

33254 Federal Register / Vol. 83, No. 137 / Tuesday, July 17, 2018 / Notices

information collection request; they will FOR FURTHER INFORMATION CONTACT: proven to be reliable and effective in
also become a matter of public record. Sheila McConnell, Director, Office of controlling the mine roof, face, and rib.
Standards, Regulations, and Variances, Title 30 CFR 56.3203(a), 57.3203(a),
Sheila McConnell, and 75.204(a) require: (1) That mine
MSHA, at
Certifying Officer. MSHA.information.collections@dol.gov operators obtain a certification from the
[FR Doc. 2018–15217 Filed 7–16–18; 8:45 am] (email); (202) 693–9440 (voice); or (202) manufacturer that roof and rock bolts
BILLING CODE 4510–43–P 693–9441 (facsimile). and accessories are manufactured and
SUPPLEMENTARY INFORMATION: tested in accordance with the applicable
ASTM specifications, and (2) that the
DEPARTMENT OF LABOR I. Background manufacturer’s certification is made
Section 103(h) of the Federal Mine available to an authorized representative
Mine Safety and Health Administration of the Secretary.
Safety and Health Act of 1977 (Mine
Act), 30 U.S.C. 813(h), authorizes Title 30 CFR 56.3203(h) and
[OMB Control No. 1219–0121] 57.3203(h) require that if the mine
MSHA to collect information necessary
to carry out its duty in protecting the operator uses other tensioned and
Proposed Extension of Information nontensioned fixtures and accessories
Collection; Safety Standards for Roof safety and health of miners. Further,
section 101(a) of the Mine Act, 30 U.S.C. for ground control that are not
Bolts in Metal and Nonmetal Mines and addressed by the applicable ASTM
Underground Coal Mines 811, authorizes the Secretary of Labor
standard listed in sections 56.3203(a)
(Secretary) to develop, promulgate, and
AGENCY: Mine Safety and Health and 57.3203(a), test methods must be
revise as may be appropriate, improved
Administration, Labor. established by the mine operator and
mandatory health or safety standards for
ACTION: Request for public comments.
used to verify their ground control
the protection of life and prevention of
effectiveness. Title 30 CFR 56.3203(i)
injuries in coal and metal and nonmetal
SUMMARY: The Department of Labor, as and 57.3203(i) require that the mine
mines.
part of its continuing effort to reduce operator certify that the tests developed
Accidents involving falls of roof, face,
paperwork and respondent burden, under sections 56.3203(h) and
and rib in underground mines or falls of
conducts a pre-clearance consultation 57.3203(h) were conducted and such
highwall in surface mines, historically,
program to provide the general public certifications be made available to an
have been among the leading causes of
and Federal agencies with an authorized representative of the
injuries and deaths. Prevention or
opportunity to comment on proposed Secretary.
control of falls of roof, face, and rib is Title 30 CFR 75.204(f)(6) requires that
collections of information in accordance uniquely difficult because of the variety
with the Paperwork Reduction Act of the mine operator or a person
of conditions encountered in mines that designated by the operator certify by
1995. This program helps to ensure that can affect the stability of various types
requested data can be provided in the signature and date the measurements
of strata and the changing nature of the required by paragraph (f)(5) of this
desired format, reporting burden (time forces affecting ground stability at any
and financial resources) is minimized, section have been made. Paragraph (f)(5)
given operation and time. Roof and rock requires that in working places from
collection instruments are clearly bolts and accessories are an integral part
understood, and the impact of collection which coal is produced during any
of ground control systems and are used portion of a 24-hour period, the actual
requirements on respondents can be to prevent the fall of roof, face, and rib.
properly assessed. Currently, the Mine torque or tension on at least one out of
Advancements in technology of roof and every ten previously installed
Safety and Health Administration rock bolts and accessories have aided in
(MSHA) is soliciting comments on the mechanically anchored tensioned roof
reducing the hazards associated with bolts is measured from the outby corner
information collection for Safety falls of roof, face, and rib.
Standards for Roof Bolts in Metal and of the last open crosscut to the face in
The American Society for Testing and each advancing section. This
Nonmetal Mines and Underground Coal Materials (ASTM) publication
Mines. certification shall be maintained for at
‘‘Standard Specification for Roof and least one year and shall be made
DATES: All comments must be received Rock Bolts and Accessories’’ is a
on or before September 17, 2018. available to an authorized representative
consensus standard used throughout the of the Secretary and representatives of
ADDRESSES: Comments concerning the United States. It contains specifications the miners.
information collection requirements of for the chemical, mechanical, and MSHA has found that the certification
this notice may be sent by any of the dimensional requirements for roof and requirements have been successful in
methods listed below. rock bolts and accessories used for maintaining compliance with
• Federal E-Rulemaking Portal: ground support systems. The ASTM requirements for roof and rock bolts and
http://www.regulations.gov. Follow the standard for roof and rock bolts and accessories.
on-line instructions for submitting accessories is updated periodically to
comments for docket number MSHA– reflect advances in technology. II. Desired Focus of Comments
2018–0027. Title 30 Code of Federal Regulations, MSHA is soliciting comments
• Regular Mail: Send comments to Parts 56 and 57 Subpart B-Ground concerning the proposed information
USDOL–MSHA, Office of Standards, Control, section 56.3203 and section collection related to Safety Standards
Regulations, and Variances, 201 12th 57.3203, and Part 75 Subpart C-Roof for Roof Bolts in Metal and Nonmetal
Street South, Suite 4E401, Arlington, Support, section 75.204, address the Mines and Underground Coal Mines.
daltland on DSKBBV9HB2PROD with NOTICES

VA 22202–5452. quality of roof and rock bolts and MSHA is particularly interested in
• Hand Delivery: USDOL-Mine Safety accessories and their installation. comments that:
and Health Administration, 201 12th MSHA’s objective in these regulations is • Evaluate whether the collection of
Street South, Suite 4E401, Arlington, to ensure the quality and effectiveness information is necessary for the proper
VA 22202–5452. Sign in at the of roof and rock bolts and accessories performance of the functions of the
receptionist’s desk on the 4th floor via and, as technology evolves, to allow for Agency, including whether the
the East elevator. the use of new materials which are information has practical utility;

VerDate Sep<11>2014 17:07 Jul 16, 2018 Jkt 244001 PO 00000 Frm 00063 Fmt 4703 Sfmt 4703 E:\FR\FM\17JYN1.SGM 17JYN1

Document Created: 2018-07-17 01:38:39
Document Modified: 2018-07-17 01:38:39

Category		Regulatory Information
Collection		Federal Register
sudoc Class		AE 2.7: GS 4.107: AE 2.106:
Publisher		Office of the Federal Register, National Archives and Records Administration
Section		Notices
Action		Request for public comments.
Dates		All comments must be received on or before September 17, 2018.
Contact		Sheila McConnell, Director, Office of Standards, Regulations, and Variances, MSHA, at [email protected] (email); (202) 693-9440 (voice); or (202) 693-9441 (facsimile).
FR Citation		83 FR 33252

83 FR 33252 - Proposed Extension of Information Collection; Ventilation Plans, Tests, and Examinations in Underground Coal Mines

DEPARTMENT OF LABORMine Safety and Health Administration

Federal Register Volume 83, Issue 137 (July 17, 2018)

DEPARTMENT OF LABOR
Mine Safety and Health Administration