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一、概况 我处施工的鲍店北风井-430米水平轨道大巷、皮带大巷及炸药库回风巷,局部位于三灰上、下松软泥岩中。三灰上泥岩厚10米,节理层理发育且质脆易风化,风化物呈松软小颗粒状,体积明显增大。三灰下泥岩厚13～15.5米,除具有三灰上泥岩特点外,在距三灰底板以下3.7米处有一层厚0.7～1.3米的膨胀性粘土岩,呈灰白或灰色,该岩层较薄,但极易风化,岩层揭露遇水后则成软泥状,其膨胀性尤为明显。在施工该风
First, an overview of my office in the construction of the Bao Dian Beifeng -430 meters horizontal track lanes, belts and explosives Lane Lane return airway, located in the ash on the part of the song, under the song loose mudstone. Mudstone limestone thickness of 10 meters, the development of rational joints and crisp easy to weathering, weathering material was soft small particles, the volume increased significantly. In addition to shale characteristics of limestone, there is an expansive clay rock 0.7 to 1.3 meters thick at 3.7 meters below the lime-gray floor, which is gray or gray, and the rock is thin , But very easy to weathering, rock formation after exposure to water into a slime, its expansibility is particularly evident. The construction of the wind