摘要
Abstract
The field 3 of Taoyang Coal Mine, Shandong Feicheng Coal Mine Group, was threatened by Xujiazhuang limestone and Ordovician limestone roack water seriously. In order to ensure the security of mine exploitation, in the-550 m level east main roadway, a new waterproof gate is constructed, whose design pressure is 6. 0 MPa, belongs to the group company and is the waterproof gate under the largest pressure in the country. Waterproof after pouring and curing of the chamber of the waterproof gate, back-filled grouting is carried out in a continuous and intermittent way, especially the connection weak place is processed specially, and a lot of preparation work before the water injection test have been done, effective measures during water injection test have been taken, and a large amount of data have been obtained,which make the waterproof gate pass the one-time test successfully, and guarantee the acceptance of the expert group of the company.关键词
高压/防水闸门/壁后注浆/注水耐压Key words
high-pressure/waterproofing gate/back-filled grouting/water injection pressure stand分类
矿业与冶金
