Abstract : This paper briefly describes the limitations of traditional mine shaft operating equipment in terms of mechanization and linkage; it focuses on the application and characteristics of linear motor technology in the mechanization and linkage of mine shaft operating equipment; and it elaborates on the working principle and basic types of linear motors, as well as the application prospects of linear motor technology and suspension technology in the mechanization of auxiliary transportation in coal mines. Keywords : Linear motor; mine shaft; operating equipment; application In recent years, various types of new mine shaft operating equipment driven by linear motors, such as pushers, brakes, rocking platforms, switches, and safety doors, have been successfully developed. Linear motors, with their unique advantages, have created favorable conditions for the mechanization, linkage, and safe interlocking of signals in mine shaft operating equipment. Therefore, Wuyang Coal Mine, in conjunction with Shaanxi Linear Motor Equipment Factory, developed a set of linear motor operating equipment suitable for use at the mine's new auxiliary mine shaft, which was successfully installed at the new auxiliary mine shaft and put into use. 1. Situation Analysis Before Modification The original car handling equipment at the new auxiliary shaft of Wuyang Coal Mine included two wire rope pushers (600mm gauge, 1t series), two manual crank tables, and two single-type car stoppers. The original pushers and supporting equipment used mechanical conversion devices, which were bulky, weak, and mostly damaged shortly after installation. The pushers had long been out of use, and the crank tables and car stoppers were also malfunctioning. The heavy pushing work relied entirely on manual labor by the hook-handlers, resulting in high labor intensity, low production efficiency, and, importantly, the hoisting signal and cage position could not reliably interlock with the actions of the car stoppers, crank tables, and pushers, posing a serious threat to safety at the shaft and failing to meet the production needs of modern mines. 2. Working Principle of Linear Motors A linear motor (or simply linear motor) is a special type of motor that can directly convert three-phase AC electrical energy into linear motion mechanical energy. Corresponding to rotary motors, linear motors can also be divided into asynchronous linear motors and synchronous linear motors. Imagine cutting a rotating asynchronous motor in half at a certain point. The rotating magnetic field, which originally moved at a linear velocity, becomes a translating magnetic field moving at the same linear velocity. The rotor, which originally rotated, now moves in a straight line with a velocity of u2. 3.2 Construction Methods The new auxiliary shaft of Wuyang Mine is a production mine and construction cannot be carried out while production is stopped. Considering the characteristics of the linear motor trolley operating equipment and production needs, a two-stage construction plan was adopted for the entry and exit sides during installation. That is, the entry side was installed, debugged and put into use, and then the exit side was installed. Finally, the equipment was debugged and handed over in a concentrated manner. During installation, a new process of one-time leveling and alignment and one-time grouting was adopted, which improved the installation accuracy and shortened the installation period. 3.3 Operation Results (1) The operating equipment has sufficient thrust. The trolley pusher has two gears. The thrust of the 1t or 3t single trolley is 3430N and 6883N respectively, and the maximum thrust can reach 10290N. The thrust is more than sufficient. (2) The speed of the trolley operating equipment meets the production requirements. The safety gate speed is 2.5m/s, and the trolley pusher speed is 0.99m/s. Each operation in Wuyang Mine takes 8.5s. According to the "Coal Mine Design Code", the operation time for filling a 1t single car is 12 seconds. In addition, the operation of equipment such as the rocking platform, car stopper, and switch machine is flexible and reliable, which fully meets the time requirements of mine production. (3) The structure of the car operation equipment is simple and reasonable. The equipment is a non-contact transmission system, and there is basically no friction problem during the transmission process, and the wear of the equipment is low. The secondary plate of the pusher is supported by rollers, and the maximum temperature does not exceed 35℃, which meets the temperature rise requirements of frequent forward and reverse starting of the motor. The linear motor is sealed with epoxy resin, which achieves moisture-proof, dust-proof and corrosion-proof. (4) The electrical control of the car operation equipment is safe and reliable, and the operation is convenient and flexible. In particular, the KYCx-1 type mine general permanent magnet limit switch is used, that is, a non-contact permanent magnet switch, and the signal is very accurate and reliable. The motor has no starting impact current, the grid load is stable, and the energy consumption is low. 3.4 Control characteristics (1) The position of the cage and the locking of the car operation equipment such as the safety door. After the cage is lifted into position, the operating system can be powered on. Otherwise, the safety door cannot be opened and other operating equipment cannot be operated. (2) Interlock between lifting personnel and lifting goods. When lifting personnel, the personnel and goods selection switches on the operating table are set to the personnel position. After the cage is in position, only the safety door and the rocking platform can be operated and the interlocking requirements are met. Other operating equipment will not be powered on and will not be operated even if misoperated. When lifting goods, the personnel and goods selection switches on the operating table are set to the goods position. After the cage is in position, the operator can use the manual and linkage selection switches to achieve manual operation or linkage control operation respectively and achieve the relevant interlocking. (3) Interlock between the lifting signal and operating equipment such as the safety door and rocking platform. That is, the start signal can only be issued when the four safety doors are closed, the four rocking platforms are raised, and the two car stoppers are closed. Otherwise, the start signal cannot be issued if any safety door is not closed in position, or a rocking platform is not raised in position, or a car stopper is not closed in position. At the same time, the rocking platform can only be raised when the car stopper is closed in position. Otherwise, the rocking platform cannot be raised. (4) Control the interlock between the main and auxiliary cages on both sides of the car handling equipment, and have the function of pressing the "emergency stop" button to cut off the main power supply in case of an accident during operation, so as to prevent the accident from escalating. 4 Benefit Analysis (1) This set of equipment realizes the automation of the mine car handling, saves labor, improves labor efficiency, and has low energy consumption. The energy consumption per 1000 car handlings is 24 kW·h lower than that of the wire rope pusher. (2) This set of equipment is safe and reliable, with complete interlocks, and meets the relevant requirements of the "Coal Mine Safety Regulations". It realizes the linkage interlock of the mine car handling, and eliminates the mine car falling into the mine and personal safety accidents that may be caused by misoperation. It creates good conditions for the safe production of coal mines. It has accumulated rich experience in the application of linear motor technology and suspension technology in the auxiliary mechanized transportation of coal mines, and has great social benefits and promotion and application value.