Reforming coal mining method is the only way for small and medium coal mines to become bigger and stronger.

Many years of experience and lessons have taught us that the backwardness of coal mining methods is the biggest hidden danger of coal mine safety. On the one hand, coal mining methods are backward, causing serious waste of resources. On the other hand, coal mining methods are lagging behind, people are loading and unloading, and mining and blasting are being carried out. Workers are in a dangerous working environment and safety cannot be guaranteed. To fundamentally solve the security problem, we must first resolve the backwardness of the coal mining method, eliminate backward productivity, and achieve essential safety, so as to achieve a fundamental turn for the coal mine safety production situation.

Shanxi Zhongdan Dongpo Coal Co., Ltd. was originally a small coal mine with a production capacity of only 60,000 tons/year. When the coal company took over the reconstruction, this small coal mine has been included in the list of local elimination mines. China Coal Corporation upgraded the coal mining mechanization of Dongpo Coal Mine and upgraded the scale from 60,000 tons to 1.5 million tons per year. The mine adopts a comprehensive mechanized coal mining method, using the current largest domestic coal shearers, hydraulic supports, scraper conveyors and belt conveyors, and advanced automated electrical control equipment. In the new round of mergers and reorganizations, the scale of the mine has been raised to 2.1 million tons/year and it has become the main enterprise in the coal chemical industry park in Lucheng district. Practice has proved that reforming coal mining methods is the only way for large and medium-sized coal mines to become bigger and stronger.

Prior to the reform of the coal mining method, the majority of mines in Ganzhou City mostly used knife pillars, room pillars and lane-column informal mining methods. This kind of coal mining method is full-time mining, the roof is suspended over a long period of time and cannot be supported, and there are many working surfaces. The airflow adjustment is not good, and gas accumulation and roof accidents are easily caused. The backward coal mining method has resulted in a low recovery rate of resources, a minimum recovery rate of only 20%, an average recovery rate of 25%, and a loss of 40,000 tons of resources for each 10,000 tons of coal produced. At the same time, most of the Yanzhou coal mines are located in the Carboniferous Permian coal seams, hard roofs, multiple faults, and much more thorium, making it difficult to promote and use modern coal mining technology. To this end, Shuozhou has adopted a multi-pronged approach and comprehensively promoted the reform of coal mining methods.

First of all, the government attaches great importance. The Ganzhou municipal government proposed in 2006 that the coal industry should adhere to the principle of “preserving large, small, and unprofitable”, accelerating the pace of large-scale mine construction, encouraging coal mines to reform coal mining methods, and gradually eliminating backward productivity. In 2007, the municipal government set a goal of “four 70%”, that is, more than 70% of coal mines would achieve mechanized mining, and more than 70% of coal mines would cooperate with large companies and big groups, coal recovery rate would reach over 70%, and coal washing The rate reached more than 70%. Among them, the mechanization of coal mines is the primary indicator. In 2009, when the new round of mergers, acquisitions and reorganization of coal mines is about to begin, Luzhou City has decisively put forward the “one-step, two-out” phase-out. First, it eliminates one or more mines with an annual production capacity of less than 900,000 tons in one step. Second, it is a step. The artillery mining and blasting techniques have been eliminated in place, and all of them have been comprehensively mechanized to achieve integration of coal mining, excavation and production, washing, transportation, processing and transformation, and one-stop operations. At present, among the 64 coal mines supervised by the city, 10 fully-integrated coal mining wells have been put into operation, 35 wells have been installed, and 15 coal mines will be completed by the end of the year. By the end of next year, the city will All coal mines have all completed fully integrated mining wells. In this way, the Ganzhou coal mine will completely bid farewell to the centuries-old squatter layout, high-level coal mining methods, coal mine productivity levels, safety and security levels and resource recovery levels a qualitative leap.

Followed by the industry full boost. The municipal, district and county coal management departments organized mobilization meetings, on-site promotion meetings, and on-site observation meetings. They hired national and provincial leaders and experts from universities and research institutes to research and demonstrate in Zhangzhou City to discuss the comprehensive mining technology. The feasibility of special thick coal seam mining, and many times organized coal mines to Shenhua, Inner Mongolia and other places to visit the 10 million tons of mine fully mechanized coal mining face, and full-scale production equipment manufacturers to investigate. Selecting mature coal mines to carry out comprehensive mining pilots, adopting typical approaches to guide roads and model demonstrations, prompting coal mine operators to actively study and draw on the successful experience of coal mining method reforms, and increase the daily guidance and supervision efforts. The coal mines will not be replaced with new production licenses, and the implementation of regular wall-type mechanized mining in the production mines will be carried out as a target task, and will be implemented in the departments and staff. For the resource integration of mines and infrastructure mines, before the start of construction, the mining company is required to make commitments and guarantees for machine mining, such as the production of purchase orders, deposit deposits, etc., and take coal mining method reform as one of the conditions for the entry of coal mines. In the process of fully mechanized coal mining, in view of the problems of hard, multi-faulted and multi-faulted coal seams in the Carboniferous and Permian coal seams, we actively guided coal mines to strengthen mine pressure observation and roof monitoring, and mastered the laws of mine pressure and roof cycle pressure. The management of the coal mining unit and the improvement of the technical level have been strengthened. In the past three years, the Luzhou Coal Mine has successively introduced more than 20 fully-mechanized mining technology teams from big groups and large companies into the established system, and has trained 1300 people. Five years ago, the coal mining technicians did not exceed one mine, and now they have reached more than 40 mines. Basically, a full-fledged mechanized coal mining team has been established. It is not uncommon for a fully-mechanized coal mining team to produce more than one million tons of coal per year.

Third, companies are willing to invest. The coal mining process in Zhuozhou City is mainly based on the reform of the coal mining process. It has carried out five major system construction and transformation activities such as underground mining, lifting transportation, ventilation, drainage, and power supply. Down-hole implementation of the regular wall type mechanized mining, combined hydraulic support, coal mining machine fell coal, scraper transport transport, and gradually cancel the shot. Continuously improve the technological level of the coal mining process, from short-walled to long-walled, from gun mining to fully mechanized mining. In recent years, the city's investment in the mechanization of coal mines has exceeded 10 billion yuan. 30 coal mines have passed the provincial coal industry bureau's mechanized coal mining upgrades and approvals, and have obtained legal construction and production procedures. Among them, the coal mines headed by Dongpo, Dangxin, Xingtao, Hou'an, Shaoyaohua, Wujiagou, Luzigou, and Chaigou were the first to use fully-mechanized coal mining, and they benefited first, first, and first. These coal mines have not only been independently retained in previous shutdowns, mergers, and consolidations, but also rely on advanced coal mining technology and sound management experience to become the main enterprise for local mergers, reorganizations, and integrations.

Through the reform of the coal mining method, not only has the coal mining technology achieved a revolutionary change, but it has also led to the “three distinct” changes in the coal industry: First, a large number of small mines have been eliminated, and a large number of modern large mines have been spawned. The coal industry The level has changed significantly. In the early days of the construction of the city, most of the coal mines in Ganzhou were coal mines with an annual output of 30,000 tons and up to a total of 90,000 tons. 10,000 tons, 210,000 tons, 450,000 tons, up to now 1.28 million tons; the resource recovery rate has changed significantly: the recovery rate of the mechanized full-mechanized mining wells reaches over 75%-85%; the safety and security capabilities have changed significantly: None of the mines that used the fully mechanized mining experienced an accident that killed more than three people.