淮北刘店煤矿岩浆侵入对7煤层稳定性的影响分析

刘店煤矿7煤层遭岩浆侵蚀严重,致使煤层结构和厚度发生改变。采用煤厚变异系数定量评价了煤层厚度稳定性。通过对比岩浆侵蚀前后煤层的厚度及其结构变化,探究了岩浆侵蚀对煤层稳定性的影响。结果表明,岩浆侵蚀致使煤层厚度变薄,部分煤层变质为天然焦;同时由于岩浆穿插使煤层成为多个分层,降低了煤层的稳定性。断层是岩浆运移的主要通道,岩浆的侵入中心在断层F34与F32的交汇处附近。

Influence of Magmatic Intrusion on 7 Coal-seam Stability of Liudian Colliery,Huaibei

7th coal-seam of Liudian Colliery was seriously eroded by magmatic rock,which resulted in large variation of coal-seam structure and thickness.This paper applied coal thickness variation coefficient to evaluating coal-seam stability by comparing thickness and structure variation before and after magmatic intrusion.Results showed that magmatic intrusion made coal-seam thin and local coal to be mineral coke.Coal-seam became multi layers because of magmatic rock penetration,which reduced stability.Faults were main channels of magma moving.The center of magma intrusion lay intersection of the fault F34 and F32.