MT/T 1090-2008 English PDF (MTT1090-2008)

Delivery: 3 seconds. Download true-PDF + Invoice.
Get QUOTATION in 1-minute: Click MT/T 1090-2008
Historical versions: MT/T 1090-2008
Preview True-PDF (Reload/Scroll if blank)

MT/T 1090-2008: Evaluation of coal quality in coal resource exploration
MT/T 1090-2008
COAL INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 73.020
D 10
Record No.: 26891-2010
Evaluation of Coal Quality
in Coal Resource Exploration
ISSUED ON: DECEMBER 11, 2009
IMPLEMENTED ON: JULY 01, 2010
Issued by: State Administration of Work Safety
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Basic Requirements for Coal Quality Work in Coal Resource Exploration ... 5
4 Take Coal Sample ... 7
5 Package, Inspection and Storage of Coal Sample ... 11
6 Test of Coal Sample ... 12
7 Evaluation of Coal Quality ... 13
8 Coal Quality Report ... 17
Appendix A (Informative) Sampling and Testing Workload ... 21
Appendix B (Informative) Sample-Delivery Instructions ... 24
Evaluation of Coal Quality
in Coal Resource Exploration
1 Scope
This Standard specifies the requirements for evaluation of coal quality at various
stages of the coal resource exploration.
This Standard is applicable to the design preparation, sampling test, coal quality
research, and preparation of exploration report at various stages of the coal resource
exploration.
2 Normative References
The provisions in following documents become the provisions of this Standard through
reference in this Standard. For dated references, the subsequent amendments
(excluding corrigendum) or revisions do not apply to this Standard, however, parties
who reach an agreement based on this Standard are encouraged to study if the latest
versions of these documents are applicable. For undated references, the latest edition
of the referenced document applies.
GB 5751 Chinese Classification of Coal
GB 6566 Limit for Radionuclides in Building Materials
GB/T 13908 General Requirements for Solid Mineral Exploration
GB/T 15224.1 Classification for Quality of Coal Part 1: Ash
GB/T 15224.2 Classification for Quality of Coal Part 2: Sulfur Content
GB/T 15224.3 Classification for Quality of Coal Part 3: Calorific Value
GB/T 16417 Method for Evaluating the Washability of Coal
GB/T 19224 Determining the Relative Degree of Oxidation in Bituminous Coal
GB/T 20104 Method for Identifying Tendency of Coal to Spontaneous Combustion
by Oxygen Absorption with Chromatograph
researching its process performance; evaluating their industrial use; proposing the coal
processing and their utilization direction; so that provide data for the study of coal
sedimentary environment, coal seam comparison and environmental protection. At
each stage of the coal resource exploration, coal quality data of neighboring production
mines shall be fully collected to provide basic data for the further development of coal
quality work.
3.2 Coal quality work in the reconnaissance stage
Generally-understand the general characteristics of coal types and coal quality; study
the original materials of coal, coal rock composition, as well as types of coal formation;
study the coal quality characteristics of each major coal seam, its changing law, and
the changing rules of major harmful components in coal; preliminarily analyze the coal
metamorphic factors. Sampling types, quantities, and test items can refer to Tables A.1
and A.2 in Appendix A.
3.3 Coal quality work in the prospecting stage
Roughly-determine the characteristics of coal types and coal quality in the mineable
coal seam; study the original materials of coal, coal rock composition, as well as types
of coal formation; study the coal quality characteristics of each major coal seam, its
changing law, and the changing rules of major harmful components in coal; further
analyze the metamorphic factors in each major coal seam. Sampling types, quantities,
and test items can refer to Tables A.1 and A.2 in Appendix A.
3.4 Coal quality work in general exploration stage
Basically-identify the coal quality characteristics and process performance of the
mineable coal seam; determine the coal types of the mineable coal seam; evaluate the
industrial utilization direction of coal; preliminarily identify the weathering zone
boundary of the major mineable coal seam; evaluate the degree of change of the coal
quality of coal seam; comprehensively study the physical and chemical characteristics
and changing law of each mineable coal seam; study the coal distribution law; make a
preliminary evaluation of the comprehensive utilization direction of coal and its impact
on the coal seam mining. The sampling types, quantities and test items can refer to
Tables A.1, A.2, and A.3 in Appendix A.
3.5 Coal quality work in detailed exploration stage
Find out in detail the characteristics of coal types and coal quality of mineable coal
seam, and their changes within the pre-mined area. According to the requirements of
development and construction, focus on studying the coal quality characteristics and
process performance related to the mining, washing, processing, sales, environmental
protection, utilization, etc. of the coal; and make corresponding evaluation. The
sampling types, quantities, and test items can refer to Appendix A, and Tables A.1, A.2,
and A.3.
4.2.2 The coal sample of coal core is generally taken as full-layer sample based on the
independent coal seam. When the coal quality is significantly different and the layer
thickness is greater than 0.5m, then take the stratified coal sample. When sampling
from the coal seam with complex structures, it shall be taken separately according to
the gangue and coal stratification.
4.2.3 The gangue larger than 0.01m to the minimum mineable thickness of coal seam
shall be sampled separately. For the gangue greater than the minimum mineable
thickness of coal seam, if it belongs to non-carbonaceous mudstones, it shall not be
sampled; if it belongs to carbonaceous mudstones or soft rocks, it shall be sampled
separately. The gangue with thickness less than or equal to 0.01m, it shall be sampled
together with the connected coal layer rather than be removed. The gangue of multiple
thin coal seam can be sampled separately, or combined with the same lithology to be
sampled.
4.2.4 When the false top and false bottom of the coal seam are carbonaceous
mudstones, full-layer samples shall be taken separately. If it belongs to the non-
carbonaceous mudstone, the layer thickness is greater than 0.1m, take sample of 0.1m;
if the layer thickness is less than 0.1m, all shall be sampled.
4.2.5 The coal sample of coal core needs to be sampled according to different coal
seams without shrinkage. When the coal seam thickness is large, it shall be sampled
in sections. The section thickness is generally no greater than 3.0m; the interval of
steeply inclined coal seams can be appropriately relaxed.
4.2.6 When taking out the coal core from the borehole to the end of the sampling, it
shall not exceed 8h for lignite, not exceed 24h for bituminous coal, and not exceed 48h
for anthracite. The mass of the coal sample of coal core shall be at least 1.5kg. If
special items of test are required, the number of samples can be determined according
to the test requirements.
4.3 Coal sample for testing washability
4.3.1 The coal sample for testing washability can be divided into two types including
size and float-sink test coal sample (also known as production sample), and coal
sample for testing washability of coal core coal sample (also known as simple sample).
4.3.2 The size and float-sink test coal sample shall be taken in the production mines
or exploration tunnels with a mass of no less than...