(2) intelligence. Increased the requirements for the promotion of automation and intelligent mining.
(three) the number of mining faces produced at the same time. Add the following requirements:
(1) There shall be no more than three working faces in a mine at the same time, and no more than nine driving faces in coal roadway (semi-coal rock roadway). It is forbidden to dig instead of mining.
(2) Within the mining influence range, two coal mining faces shall not be arranged for simultaneous mining.
(3) It is strictly forbidden to arbitrarily mine the coal pillars supporting the roof and overlying strata of the goaf, and safely isolate the coal pillars of the goaf with the method of not caving.
(4) It is forbidden to mine and destroy the safety coal pillar of high-speed railway.
(4) Top coal caving mining after outburst elimination in outburst coal seam. The relevant contents were further adjusted and improved: "In the spontaneous combustion coal seam of high gas outburst mine, comprehensive gas drainage measures mainly based on pre-drainage should be taken to ensure that the gas content in this coal seam is not more than 6m3/t, and comprehensive fire prevention and extinguishing measures should be taken." "After caving mining, it may be connected with surface water, old kiln water and strong aquifer."
(5) Dust removal device. The following requirements are added: under the condition that the working stability of internal and external spraying devices cannot be guaranteed, the dust removal device jointly controlled with roadheader, anchor excavator or continuous miner should be used.
(6) Mining depth. The mining depth requirements of outburst mines with different well types are refined.
(7) Highlight prevention and control. Increase the relevant requirements of outburst prevention institutions, teams, safety management and quality control. This paper puts forward the regional outburst prevention measures of pre-pumping coal seam gas in mining area by drilling along or through layers, and requires the scope and distance of drilling control area.
(8) Prevention and control of rockburst. The general requirements for preventing and controlling rockburst in mines are put forward. The requirements are put forward for the principle of erosion prevention, the identification of impact tendency of rock burst mine, the layout and excavation of mine roadway, the monitoring of rock burst, and the evacuation and support of personnel in the measures to solve the danger.
(9) Fire prevention. Wellhead fire prevention has been improved. The requirements for formulating special safety measures, risk assessment and spontaneous combustion monitoring of goaf when it is closed are added.
(10) prevention and control of water disasters. If it is necessary to mine the coal mining face threatened by separated layer water under thick hard rock layers such as igneous rock, sandstone and limestone, it is necessary to analyze and explore the separated layer developed rock layers and take measures to dredge the separated layer water in advance.
(1 1) Blasting safety. The safety distance of blasting operation is further refined.