同华煤矿三区小窑积水的防治方案探讨

地方小煤矿越界开采被关闭后，留下了数万立方米的积水，对下方同华煤矿2132N采面的掘进和回采影响较大。通过矿区水文地质条件的分析，结合小煤矿开采和排水情况的调查，估算积水量为61024m^3，积水底部水压为0．784MPa。经计算，采区K1、K2、K3煤层开采后形成冒落裂隙导水带高度分别为48．4、58．9和48．4m，三层煤开采后的冒落裂隙导水带已导通为一个整体。提出了留设防水煤柱和疏水开采两个方案，从技术、经济和安全性比较，选择了疏水开采方案。

Probe into Small Coalmine Gob Water Controlling Scheme in Tonghua Coalmine No.3 Wining District

After small coalmines＇ mining beyond their limits and to be forced to shut down, however, tens of thousands cubic meters of gob water left over and largely impact the underside Tonghua coalmine 2132N working face driving and wining. Through mining area hydrogeological condition analysis, combined with small coalmine mining and drainage investigation, estimated amount of gob water is 61024m^3, bottom water pressure 0.784MPa. After estimation, height of coal seams K1, K2 and K3 wining formed water flowing fractured zones are 48.4m, 58.9m and 48.4m respectively, and already breakthrough into an integer. Two schemes of safety pillar and drainage mining have put forward, after comparison of technology, economy and safety, the drainage scheme is selected.