(1) Prevent open flames. It is forbidden to use open flame, smoke or use a stove to warm up within 20 meters around the wellhead room and the ventilation room; it is strictly forbidden to carry tobacco, ignition materials and chemical fiber clothes into the well; it is strictly forbidden to carry flammable products into the well and engage in welding work in the underground and wellhead rooms. must comply with the relevant provisions of the "coal mine safety regulations", and to develop security measures; forbidden to store gasoline, kerosene, transformer oil in the underground; cotton yarn for downhole use, cloth, lubricants, etc., must be placed in a covered iron bucket, prohibited Littering and throwing in the roadway, diverticulum or goaf; preventing coal from oxidizing and spontaneous combustion, strengthening the inspection and management of the fire zone, and regularly sampling and analyzing to prevent re-ignition.
(2) Prevent the occurrence of blasting flames. Explosive blasting equipment and blasting technology are strictly prohibited in underground mines; explosives and detonators should be selected according to the provisions of the "Safety Regulations for Coal Mines", and unqualified or deteriorated explosives are not allowed to be used; the depth of the blasthole and the amount of charge must conform to the operation. The regulations stipulate that the blasthole filling should be full, be realistic, and adhere to the use of blister mud; it is forbidden to use the exposed joint or the exposed blasting busbar; the connection between the blasting busbar and the detonator should be firm to prevent the generation of electric spark; the blaster should start in the incoming airflow as much as possible. Detonator; it is forbidden to put out guns and cannons; strictly implement the "one shot and three inspections" system.
(3) Prevent sparks. When selecting underground electrical equipment, it should meet the requirements of the â€œSafety Regulations for Coal Minesâ€. The explosion-proof performance of electrical equipment should be checked regularly and frequently. If it does not meet the requirements, it should be replaced and repaired in time. Otherwise, it is not allowed to be used; the electrical equipment at the wellhead and underground must be protected. Lei and anti-short circuit protection devices, take effective measures to prevent downhole stray current; all cable joints are not allowed to have "chicken claws", "sheep tails" and Ming joints; it is strictly forbidden to work; the miner's lamp to be delivered must meet the requirements, and it is strictly forbidden to dismantle in the underground. Open, tap and hit the lamp head and light box.
(4) Prevent other sources of ignition. The surface resistance of high molecular materials such as plastics, rubber, and resins used in mines should be lower than the specified value. Install on the heat generating member overheating protection means; in the case of surface active low friction member gold metal plating solution; of alloy properties is difficult to ignite. When the mining face of the integrated mechanized unit operation encounters hard rock, the blasting treatment shall be adopted, and the water cutting and cooling measures shall be taken at the pick of the unit.
Honeycomb paper is made according to the principle of natural honeycomb structure. It connects the corrugated paper into countless hollow three-dimensional regular hexagons by glue bonding to form a whole force-bearing part-the paper core, and it is bonded on both sides. A new type of sandwich structure environmentally friendly and energy-saving material made of paper
Lightweight, less materials, and low cost.
Compared with other various sheet structures, the honeycomb sandwich structure has the largest strength/mass ratio, so the performance/price ratio of its finished products is good, which is the key to the success of honeycomb paper.
High strength, smooth surface, not easy to deform.
The honeycomb sandwich structure is approximately isotropic, has good structural stability, and is not easy to deform. Its outstanding compressive resistance and bending resistance are the most important characteristics required by box packaging materials.
Good impact resistance and cushioning.
Honeycomb paper is made of flexible paper core and facial paper, which has good toughness and resilience. The unique honeycomb sandwich structure provides excellent cushioning performance and has higher energy absorption per unit volume among all cushioning materials. , High-thickness honeycomb paper can replace the EPS plastic foam cushion that has been widely used.
Sound absorption and heat insulation.
The interior of the honeycomb sandwich structure is a closed chamber filled with air, so it has good sound insulation and heat preservation performance.
No pollution, in line with modern environmental protection trends.
Honeycomb paper is all made of recyclable paper materials, which can be recycled 100% after use. The waste and leftover materials from the corrugated box production process can also be die-cut and bonded to form a honeycomb corrugated cardboard cushion of various shapes. Even if they are discarded, they can be degraded and absorbed by nature. Good green packaging materials. In European and American countries, the wood packaging needed for goods imported from my country must be fumigated, and honeycomb paper is a new type of environmentally friendly material.
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