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地质勘探坑道的特点是独头坑道多,掘进速度快,地質变化大,时间利用短。我队有的基本坑道長度达600公尺左右,一个坑口的总長度达3000公尺。坑道断面为3.6～4.4平方公尺,每个坑道內經常保持开动二台风鑽(最高达到四台),采取三班連續作业,一次放炮的炸药总消耗为20～40公斤。坑內工作人員在30人左右。在高度矽化(石英岩、石灰岩)及含有毒素的矿体(汞矿、黄铁矿)中掘进。因此,对通风工作提出了一系列的独特的要求。例如,如何根据工作面及季节的变化及时調整通风系統,如何保
Geological exploration of the tunnel is characterized by more than one tunnel, tunneling speed, geological changes, the use of time is short. Some of our team’s basic tunnels are about 600 meters in length, with a total length of 3,000 meters. The section of the tunnel is 3.6 ~ 4.4m ^ 2. Two typhoons (up to four) are often started in each tunnel. Three consecutive operations are carried out. The total explosive consumption of one blast is 20 ~ 40kg. The pit staff in about 30 people. Excavation is carried out in highly silicified (quartzite, limestone) and toxin-bearing ore bodies (mercury, pyrite). Therefore, a series of unique requirements for ventilation work have been put forward. For example, how to adjust the ventilation system according to the change of working face and season, how to protect it