## 1 Introduction
[33] proposed an asymmetric floor heave control scheme of \"floor leveling + anchor cable support + concrete hardening\" on the basis of the control principle of \"roof + two sides + floor\". [PERSON] et al. [34] used 3 DEC discrete-element software to simulate and analyze the characteristicsand evolution of asymmetric roadway floor heave under dynamic-load disturbance, and proposed the asymmetric control scheme of \"slurry anchor reinforcement + top cutting and pressure relief\". [PERSON] et al. [35] used UDEC software to study the floor failure mechanism under the influence of superimposed dynamic and static loads. Full-section anchor cables and inverted arches were proposed to maintain the stability of the surrounding rock. [PERSON] et al. [36] proposed the zonal reinforcement scheme of \"fix cable to shed, floor pressure relief, deep-shallow composite grouting\" and implemented it in practice, with good results. It was also proposed to control heaving by installing bolts in the roadway corners. [PERSON] et al. [37] proposed the combined support method of grouting on the floor plate and installing anchor rock bolts in floor corners. [PERSON] et al. [38] studied the mechanical properties of different types of floor corner bolts. However, in high-horizontal-stress conditions, the rock bolts are easy to bend and yield, which reduces the supporting effect. To control floor heave in gob-side entry retaining, [PERSON] et al. [13] proposed a new steel pile method that was similar to the anti-sliding pile method applied in slope engineering. In this method, steel piles are installed in roadway floor corners before the dynamic pressure zone has an influence. [PERSON] et al. [39] have shown that the floor angle pile with floor grouting can effectively control the deformation of the roadway floor and two sides. Compared with the rock bolt, the floor corner pile can effectively cut off the sliding line of the floor due to its high bending shear capacity [39]. [PERSON] et al. [40], based on the results of a numerical simulation, field tests, and microseismic monitoring, proposed a floor pressure relief borehole with a large diameter and a concrete-filled steel tube pile support to control floor rock burst. Summing up, it can be seen that floor reinforcement methods in gob-side entry retaining still need to be improved. This paper is focused on the evolution of floor heave in gob-side entry retaining. Floor heave control with an anti-shear pile method was studied. The numerical simulation with ANSYS code was used for the stress-strain analysis of the surrounding rock. Previous articles researching the effectiveness of pile methods as a method for floor heave control in underground roadways have mainly focused on floor corner piles. The main novelty of this paper is the study of a highly effective floor heave control scheme in which piles were installed not only in the floor corners but in five different positions along the entry span. At the same time, the length and type of the piles varied. Based on the analysis of floor heave causes, promising schemes of pile installation in the immediate floor were proposed and a study of their effectiveness was carried out. As a result, the most effective floor control scheme was determined.