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Magma Intrusion in No.2 Mine in Xuandong Influence on Gas Existence

Author: XiongJianLong
Tutor: ZhangYuGui；ZhangZiMin
School: Henan Polytechnic University
Course: Safety Technology and Engineering
Keywords: Magma intrusion Tectonic movement Gas distribution Tectonic Coal
CLC: TD712.2
Type: Master's thesis
Year: 2009
Downloads: 49
Quote: 1
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Abstract


Of Mesozoic and Cenozoic , Yanshan movement phase , magmatic activity , strong and frequent , magmatic activity has a broad impact on China's coal seam Seam Igneous metamorphism . Magma intrusion of gas generation , occurrence and tectonic coal distribution have an impact , this paper Hebei Xuandong mine gas , geological data , research magmatic activity and tectonic , magmatic rocks mine gas occurrence and tectonic coal distribution the impact . The use of the tectonic control theory , gas geological theory , analysis of the geological structure of the occurrence of coal mine gas control . Magma intrusion is controlled by the geological structure , the magma intrusion temperature gradient change in this area , the uneven heating of the coal seam , coal metamorphism , control coal distribution , affecting the adsorption characteristics of the coal gas . Magma intrusion in increased coal rank , to generate a large number of gas from the coal seam magmatic rocks closer , a higher proportion of its gas composition of CO2 . Goaf gas emission is the main source of gas emission ; analysis found that the geological factors influencing Gas Emission magmatic rocks affect gas Chung declared East Mine Face Gas Emission Law Analysis out of the most important factors , magmatic rocks overlying the thicker the closer from the coal seam , the greater gas emission rate . Sandstone main coal-bearing strata and contains many points seam overlying magmatic rocks is favorable Gas closed layer makes the coal seam and adjacent wall rock lithology portfolio to become good gas storage , leading goaf gas Chung a large amount of the main factors . Tectonic coal distribution is controlled by the geological structure the magma intrusion exacerbated by the destruction of the coal . The analysis by the force of magma intrusion seam magma rock layers thicker the nearer from the coal seams , coal seams greater the stress , the extent of the damage is more obvious . Affect gas occurrence magma intrusion , strengthen the coal mass destruction , the high-energy gas and construction of the coal seam at the same time the possibility of enhanced magmatic rocks near gas outburst coal easily .

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CLC: > Industrial Technology > Mining Engineering > Mine safety and labor protection > Mine atmosphere > Mine Gas > Seam gas occurrence
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