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The Tectonic Control on Gas Occurrence and the Gas Forecast in Changcun Coal Mine

Author: ZhangShuLin
Tutor: ZhangZiMin；ZhangYuGui
School: Henan Polytechnic University
Course: Mining Engineering
Keywords: Gas Geological Tectonic control Gas geological unit Gas Occurrence Coal seam overlying bedrock thickness
CLC: TD712.5
Type: Master's thesis
Year: 2011
Downloads: 127
Quote: 1
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Abstract


Gas is a gas geological body, is the product of the geological role. The modern coal seam gas occurrence state geological conditions, the impact of coal and gas outburst and Gas Emission size, is subjected to complex geological evolution of the role of coal-bearing strata. Study the tectonic evolution of the role in the control of gas occurrence has a very important significance. This paper uses the theory of plate tectonics, the gas occurrence constructed step by step control theory, learn from the results of previous studies, the the Taihang formation dynamics background and formation process; research Qinshui Basin geological evolution history (tectonic evolution, Shanxi group burial and thermal evolution coalification - Hydrocarbon generation history); regional tectonic control of the mine construction, mine the tectonic evolution of gas occurrence; Based on this combination of rich Changcun Coal Gas Geological Data analysis Ida the constructor distribution characteristics, causes and control of gas occurrence characteristics divided gas geological unit, predicted gas content of each unit and the amount of gas emission. Lu'an Coal Mine in Shanxi was the fault zone and the the Qinshui Depression nuclear Ministry Wuxiang - the Yangcheng Au fold belt control, from east to west, the mine tectonic deformation by NE, NEE trending normal fault evolution for the NNE. nearly SN reverse faults and folds relief. Mine subjected to the transformation of the tectonic stress field in the tectonic evolution NNE ~ NEE to the original fracture inversion of normal faults, due to changes in the stress field, and the formation of a series of horst and graben structure, coupled with the Taihang Mountains rapid uplift of the NNE ~ NEE trending faults become the main channel of discouraging, gas to get a lot of release. NNW-trending and SN-trending faults due to the extrusion shear activity stronger, less gas release control of coal and gas outburst in deep will the distribution of the danger zone. Eastern Ida to the NNE ~ NEE fracture and stepped fault blocks control gas Occurrence; and Ida west nearly SN-trending anticline, syncline, and the main thrust fault, control gas distribution and coal and gas outburst danger. And Ida is divided into six gas geological unit, reasonably determine the Ida # 3 coal seam gas weathered zone lower limit, to establish the mathematical model of the gas content of the gas geological unit distribution, seam overlying bedrock thickness throughout the Ida gas endowed save the controlling factors. Ida gas geology unit Gas Emission gas content predicted on the basis of the analysis. This study for the mine mine planning, ventilation design, coal bed methane extraction and coal and gas outburst risk prediction reference.

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CLC: > Industrial Technology > Mining Engineering > Mine safety and labor protection > Mine atmosphere > Mine Gas > Gas emission and forecast
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