Main shaft hoist shaft bottom coal pile monitoring system

Abstract

The invention discloses a main shaft hoist shaft bottom coal pile monitoring system. The main shaft hoist shaft bottom coal pile monitoring system is a technical safety monitoring measure which utilizes a material level instrument, a coal level relay and a wind velocity sensor to respectively monitor the height and position of a coal mine main shaft hoist shaft bottom coal pile and the blockage of a shaft bottom coal discharge funnel in real time and a coal pile monitoring center to carry out computational processing and controlling and give the alarm in order to prevent a hoist tail rope of a coal mine main shaft hoist under human errors or emergent conditions from being twisted and lifted to damage main shaft hoist shaft equipment and facilities and be injured or broken due to the excessive shaft bottom coal pile. The sampling of the height and position of the main shaft hoist shaft bottom coal pile and the blockage of the shaft bottom coal discharge funnel, redundant processing andthe respective implementation of alarming and controlling can guarantee the effectiveness of monitoring under the harsh coal mine main shaft hoist shaft bottom environment, and the main shaft hoist shaft bottom coal pile monitoring system is applicable to coal mine friction type main shaft hoisting system as well as coal mine winding type main shaft hoisting systems.

Description

technical field [0001] The invention relates to an equipment monitoring device for a hoisting system of a main shaft of a coal mine, in particular to a monitoring system for monitoring coal at the bottom of a hoisting machine of a main shaft. Background technique [0002] Underground coal mine is a kind of underground mining operation. Usually, the air inlet and return air shafts are opened on the ground to the underground, and the main transportation roadways, mining area transportation roadways, and mining face roadways are arranged between the air inlet and return air shaft shafts to form a ventilation system. system for mining activities. Large and medium-sized underground coal mines at home and abroad are equipped with main shaft and auxiliary shaft hoisting system. Both the main shaft and auxiliary shaft become the air inlet shaft, and the main shaft hoisting system is used to lift the beneficial mineral products extracted from the coal mine underground. Coal mines us...

AI Technical Summary

Problems solved by technology

Under special circumstances, when the height difference between the weighing bucket and the loading port of the skip exceeds the limit due to the untimely adjustment of the main rope extension of the hoist in the main shaft, a large amount of coal in the weighing bucket cannot be loaded into the skip and will be scattered on the main shaft. The bottom of the well hoist caused the pile of coal at the bottom of the main shaft hoist to increase rapidly, so that the tail rope of the main shaft hoist was lifted up, causing the wellbore equipment and facilities of the main shaft hoist to be damaged, and the tail rope of the hoist to be pulled and broken. ACCIDENT

[0003] At present, the hoisting system of the main shaft of underground coal mines in the country generally adopts the method of manual regular inspection of the pile of coal at the bottom of the shaft, which has great disadvantages. Coal piled up at the bottom of the hoist shaft lifts the tail rope of the hoist, causing major hoisting accidents such as damage to the wellbore equipment and facilities of the hoist in the main shaft, and damage to the tail rope of the hoist, which brings great hidden dangers to the hoisting system of the main shaft:

[0004] 1. The amount of coal piled up at the bottom of the main shaft hoist and the degree of accumulation are completely manually inspected regularly. Once the manual inspection is not in place, it will cause too much coal piled up at the bottom of the main shaft hoist, and the tail rope of the hoist will lift up, resulting in the tail of the hoist. The rope pulls down the wellbore equipment and facilities, and the tail rope of the hoist is seriously injured or even broken.

[0005] 2. There needs to be a certain height difference between the metering bucket and the loading port of the skip at the hoist shaft loading place of the main shaft hoist, and the main rope of the hoist is affected by the tension, and the length changes randomly

Therefore, the height difference between the metering bucket and the loading port of the skip needs to be adjusted frequently. Once the adjustment is not timely or the height difference changes greatly, the bottom of the main shaft hoist will soon pile up coal too high, causing the hoisting tail rope to twist and hold up , a major lifting accident occurred

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