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Protective layer selecting method of coal and gas outburst

A gas outburst and protective layer technology, which is applied in earth square drilling, surface mining, underground mining, etc., can solve the problems of manpower and financial resources waste, lack of geological theoretical basis for protective layer, and lack of theoretical basis, so as to reduce the problem of readjustment, Reduce the effect of blindness problems

Inactive Publication Date: 2012-11-07
CHINA COAL TECH ENG GRP CHONGQING RES INST
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Problems solved by technology

[0002] The selection of the existing coal and gas outburst protective layer is mainly based on the coal and gas outburst hazards in the protective seam coal seam during the actual mining process, as well as the distance from the protected layer, mining sequence, etc. to select the coal and gas outburst protective layer. The selection method of gas outburst protective layer is mainly based on experience and lacks the geological theoretical basis for the selection of protective layer. After years of practical application, this method has played a good role in the prevention and control of coal and gas outburst disasters. However, for some mines, there are no on-site conditions. There is blindness in the selection of coal and gas outburst protective layers, which requires readjustment of coal mining deployment in the actual production process, resulting in a lot of waste of manpower and financial resources. The selection of coal and gas outburst protective layers in the prior art is mainly based on experience and lacks theoretical basis

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  • Protective layer selecting method of coal and gas outburst
  • Protective layer selecting method of coal and gas outburst
  • Protective layer selecting method of coal and gas outburst

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specific Embodiment approach

[0062] S1: The coal measures of the Upper Permian Xuanwei Formation are mined in the mine field. According to the analysis of sedimentology and sequence stratigraphy, the coal measures strata belong to the delta sedimentary system. More than 30 layers of coal, 11 layers that can be mined and partially mined: 1 # , 4 # , 7 # ,8 # , 11 # , 12 # , 13 # , 14-1 # , 14-2 # , 17 # , 28 # , the mine is currently mainly exploited 1 # , 7 # ,8 # , 11 # seam.

[0063] According to the sequence stratigraphic division of coal measures in Wangjiazhai coal mine, Shuicheng mining area, the coal-bearing strata (Xuanwei Formation) of Wangjiazhai coal mine can be divided into two sequences according to sequence stratigraphy.

[0064] Sequence I: from the top of the basalt to 11 # The argillaceous sandstone and mudstone at the top of the coal seam. Sequence I has only transgressive systems tract and high-water system tract. The transgressive system tract is a retrogradation seque...

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Abstract

The invention discloses a protective layer selecting method of coal and gas outburst, and aims at solving the problems that protective layer selection of coal and gas outburst mainly relies on experience and lacks theoretical basis. According to the invention, theories including sedimentology and sequence stratigraphy are adopted, and coal measure strata rock stratum property, rock stratum thickness, rock stratum spacing, coal seam thickness and sequence system domain of coal seams are analyzed; under the same geological tectonic conditions, the nearer the coal seams to transgression systems domain largest sea (lake) flooding surface positions, gas storage amount is larger (except limestone top floor coal seams), highlighted tendentiousness of coal seams and gas is larger, so according to the character, coal seam gas occurrence and highlighted tendentiousness of and coal and gas are performed, and theoretical selection of coal and gas outburst protective layer can be performed. The protective layer selecting method of coal and gas outburst perfects selection basis of coal and gas outburst protective layers, solves the problem of blindness of selection of infrastructure mine coals and gas outburst protective layer, and reduces readjustment of coal mining deployment.

Description

technical field [0001] The invention relates to the field of coal mine gas prevention and control, in particular to a method for selecting a coal and gas outburst protective layer. Background technique [0002] The selection of the existing coal and gas outburst protective layers is mainly based on the coal and gas outburst disasters in the protective seam during the actual mining process, as well as the distance from the protected layer, mining sequence, etc. The coal and gas outburst protective layers are selected. The selection method of gas outburst protection layer is mainly based on experience, and lacks the geological theoretical basis for the selection of protection layer. After years of practical application, this method has played a good role in the prevention and control of coal and gas outburst disasters, but for some mines, there are no on-site conditions. The selection of protective layers for coal and gas outbursts is blind, which makes coal mining deployments...

Claims

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Application Information

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IPC IPC(8): E21C41/16
Inventor 胡千庭文光才董国伟邹银辉张庆华王麒翔赵旭生崔俊飞覃木广林辉钦唐韩英邹云龙邓敢愽张轶
Owner CHINA COAL TECH ENG GRP CHONGQING RES INST
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