1. Accurately grasp the periodic weighting interval of the coal mining face: understand the geological conditions of the mine, including the thickness, dip angle and strike of the coal seam, so as to reasonably determine the coal mining period. According to the characteristics of coal mining technology and equipment, combined with the situation of coal seam in working face, a reasonable coal mining cycle is formulated. In practice, the coal mining period should be adjusted in time, and the interval should be adjusted flexibly according to the situation and progress of the working face to ensure safe and efficient coal mining.
2. Prevent the gas from exceeding the limit during periodic weighting: strictly implement the gas drainage system to ensure that the gas concentration is within a safe range. Timely gas drainage to keep the gas concentration in the working face at a reasonable level. Strengthen the maintenance of gas detection instruments and equipment to ensure their accuracy and reliability. Calibrate test instruments regularly and replace damaged equipment in time.
Establish a perfect gas monitoring and alarm mechanism, regularly monitor the gas concentration in the working face in real time, and take necessary measures in time, such as stopping and evacuating, to prevent the gas from exceeding the standard. In-depth analysis and summary of the experience and lessons of gas overrun accidents, strengthen the training and safety awareness education for employees, and improve their safety awareness and emergency response ability.
The introduction of coal mining is as follows:
The common mechanized coal mining technology is characterized by using coal mining machinery to complete the process of coal dropping and loading at the same time, while coal transportation, roof support and goaf treatment are basically the same as blasting coal mining technology. Ordinary mechanized coal mining process system refers to the process system of coal mining with drum shearer or plough and single pillar in working face.
The difference between it and fully mechanized mining technology is that the supporting and caving process needs manual work. Therefore, this process system has a large amount of physical labor, which is far less than the fully mechanized mining process system in terms of technical and economic effects and safety. Comprehensive mechanized coal mining technology refers to the mechanization of coal breaking, coal loading, coal transportation, support and roof management in coal mining face.
In addition, the transportation in the gateway has also been mechanized accordingly to give full play to the production efficiency of fully mechanized mining equipment. Comprehensive mechanized coal mining face refers to the coal mining face jointly produced by shearer, flexible scraper conveyor and self-moving hydraulic support.