摘要
为实现矿压动力灾害治理的主动超前预控,提出了地面区域压裂卸压技术手段。通过分析孤岛工作面覆岩破断结构特征及其矿压作用,揭示了地面区域压裂控制强矿压机理。以塔山煤矿14 m特厚煤层孤岛工作面为工程背景,设计采用地面水平井分段压裂技术对高位厚硬岩层进行区域压裂改造,压裂缝网宽度200~300 m,缝网高度50~70 m,达到体积压裂效果。现场监测表明:巷道围岩最大变形量不足400 mm,未发生跳跃式/台阶式冲击变形,工作面支架阻力始终保持低值,杜绝了孤岛工作面强矿压动力显现。论文研究成果表明,地面超前区域压裂有望从源头上解决坚硬顶板工作面动力灾害难题,实现矿井的安全高产高效开采,具有实用价值和现实意义。
To achieve proactive and advanced prevention and control of mine pressure-related dynamic disasters,a technical method of ground regional fracturing for pressure relief was proposed in this study.By analyzing the structural characteristics of overburden rock failure and its mine pressure effects in an isolated working face,the ground fracturing mechanism for controlling strong mine pressure was revealed.Taking the isolated working face in a 14-meter ultra-thick coal seam of Tashan Coal Mine as the engineering background,a design employing ground horizontal well segmented fracturing technology was adopted to implement regional fracturing of the high-positioned thick and hard rock layer.The fracturing network is 200—300 m wide and 50—70 m high,achieving a volume fracturing effect.According to the field monitoring results,the maximum deformation of the roadway surounding rock is less than 400 mm,with no sudden or stepped impact deformations occurring.The working face support resistance maintains a low value all the time.The applied technology manages to eliminate the manifestation of strong mine pressure dynamics in the isolated working face.The research results of this study demonstrate that ground advanced regional fracturing,which holds promise in addressing the challenge of dynamic disasters in working faces with hard roofs from the source and enables safe,high-yield,and efficient mining operations,possesses practical value and realistic significance.
作者
高瑞
戴祥淋
于斌
杨敬轩
匡铁军
林永清
GAO Rui;DAI Xianglin;YU Bin;YANG Jingxuan;KUANG Tiejun;LIN Yongqing(College of Mining Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China;School of Mines,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Jinneng Holding Group,Datong,Shanxi 037000,China)
出处
《采矿与安全工程学报》
北大核心
2025年第3期532-543,共12页
Journal of Mining & Safety Engineering
基金
国家自然科学基金面上项目(52274135)
山西省优秀青年培育项目(202203021224006)
中国科协青年人才托举工程项目(YESS20220245)。
关键词
特厚煤层
孤岛工作面
坚硬顶板
矿压灾害
地面区域压裂
extra-thick coal seam
isolated working face
hard roof
dynamic disaster
ground regional fracturing
作者简介
高瑞(1991-),男,陕西省榆林市人,副教授,从事煤矿坚硬顶板治理、顶板地面压裂方面的研究。E-mail:gaorui@tyut.edu.cn,Tel:13813464961。
