金川二矿区深部破碎站安全高效施工技术研究

Safe and Efficient Construction Technology of Deep Crushing Station in Jinchuan No.2 Mining Area

针对金川二矿区610m水平井下破碎站建设时面临的硐室周边工程地质条件复杂、岩体稳定性较差和岩体工程密度较大等问题,结合现场工程调研和前期地质勘察结果,确定了采用上斜坡接力导硐法,从大件道上斜坡接力导硐至硐室顶部后分层、分区下刷完成硐室的深部破碎站高效施工技术方案.其技术参数为:导硐开挖断面宽和高分别为4.00 m、3.75m,导硐坡度为22°26′51″,3个分层高度分别为4.2 m、3.5m和4.7m.同时,通风系统、出毛系统、动力系统和辅助设备4个方面经过系统配置后可确保破碎硐室顺利施工.最后,对破碎硐室施工技术参数、施工顺序和工序进行优化调整,保障了其与周边相邻工程的顺序衔接.工程实施结果表明,该设计方案合理,硐室稳定性较好,突破了在工程地质复杂、岩体稳定性差和岩体工程密度大等条件下进行施工的技术难题,可为相关领域提供技术借鉴和参考.

Aiming at the problems of complex engineering geological conditions,poor stability of rock mass and high engineering density of rock mass around the chamber in the construction of underground crushing plant in 610 m level of Jinchuan No.2 mining area,combined with the results of field engineering investigation and preliminary geological survey,the high-efficiency construction technology scheme of deep crushing plant was determined,which adopted the upper slope relay guide method,from the upper slope relay guide of large cargo road to the top of the chamber,and then layering and brushing to complete the chamber.The technical parameters are as follows:the width and height of the excavation section of the guide chamber are 4.00 m and 3.75 m respectively,the slope of the guide chamber is 22°26′51″,and the three stratification heights are 4.2 m,3.5 m and 4.7 m respectively.At the same time,the four aspects of ventilation system,hair removal system,power system and auxiliary equipment can ensure the smooth construction of the crushing chamber after system configuration.Finally,the construction technical parameters,construction sequence and process of the crushing chamber are optimized and adjusted to ensure the sequence connection with the surrounding adjacent projects.The implementation results of the project show that the design scheme is reasonable and the stability of the chamber is good,which breaks through the technical problems of construction under the conditions of complex engineering geology,poor stability of rock mass and high density of rock mass engineering,and can provide technical reference for related fields.