摘要
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。
Watery abnormal areas in Cambrian limestone aquifer is defined based on underground transient electromagnetic method and DC electrical method in western roadway of Pingmei No. 8 coal mine. Combined with features of geothermal gradient and aquifuge thickness from coal floor of Ji - group to limestone roof of Cambrian, seven boreholes with depth of 150 m for dredging and draining ge- otbermal water of Cambrian limestone are designed and constructed in coal floor of western roadway. The total water inflow of these sev- en bores is 300 m3/h and the temperature of emission geothermal water reaches 50℃. The result of dredging and draining makes the water bursting dangerous region with the inrush coefficient more than 0.06 MPa/m in No. 8 coal mine decrease to 5 480 m2 each year, and the geothermal water can be drawn to surface and used for bathing, life, swimming and heating. Thus, more than 26 million yuan is saved or increased each year and the environmental benefit is remarkable.
出处
《煤矿安全》
CAS
北大核心
2012年第9期197-199,共3页
Safety in Coal Mines
基金
国家自然科学基金资助项目(40972164)
国家自然科学基金重点资助项目(40638040)
"十一五"国家科技支撑计划重点资助项目(2007BAK24B04)
关键词
富水异常区
疏放钻孔
突水危险区
地热水利用
煤矿
watery abnormal area
dredging and draining boreholes
water bursting dangerous region
utilization of geothermal water
coal mine
