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基于平煤八矿西大巷井下瞬变电磁和直流电法所划定的寒武灰岩含水层富水异常区,结合己组煤底部到寒武灰岩顶部的隔水层厚度和八矿地温梯度的分布特征,在西大巷底板设计并施工了7眼深度150 m的疏放寒武灰岩地热水钻孔。7眼疏放孔总涌水量300 m3/h,涌出地热水温度50℃。疏放的结果使得八矿突水系数>0.06 MPa/m的突水危险区每年减少5 480 m2,疏放的地热水引至地面后可用于洗浴、生活、游泳和取暖,每年可节约资金或增加收入2 600多万元,并且环境效益显著。
Based on the anomalous area of rich Cambrian limestone aquifers delineated by the transient electromagnetic field and direct current method in the underground tunnel of Pingdingshan No.8 Mine and the thickness of aquitard at the bottom of the coal seam to the top of Cambrian limestone and the groundwater temperature Gradient distribution features, 7 lanes of geothermal water of deep-burial limestone with depth of 150 m were designed and constructed in the floor of the western roadway. 7 holes dredge holes total water inflow 300 m3 / h, gush of geothermal water temperature 50 ℃. As a result of the dredging, the water inrush danger zone with water inrush coefficient of 0.06 MPa / m is reduced by 5,480 m2 per year. After the drained geothermal water is led to the ground, it can be used for bathing, living, swimming and heating, saving money or increasing annual costs Income more than 26 million yuan, and significant environmental benefits.